Rainbow-electronics LM27 Manual do Utilizador descarregar pdf (Página 7)

Typical Applications

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Note: The fan’s control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM27 goes low, the fan will speed up.

FIGURE 4. Two Speed Fan Speed Control

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FIGURE 5. Fan High Side Drive

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FIGURE 6. Fan Low Side Drive

LM27

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1 2 3 4 5 6 7 8 9

Thermostat 1
Ordering Information 2
Connection Diagram 2
Pin Description 2
Operating Ratings(Note 1) 3
Part Number Template 4
Functional Description 5
Applications Hints 5
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(Continued) 8
FIGURE 8. Simple Thermostat 8
LM27 SOT-23 9

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Rainbow-electronics LM27 Manual do Utilizador Página 7

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